Patents by Inventor Houju Fukushima

Houju Fukushima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Spark plug and manufacturing method for same
    Patent number: 9160147
    Abstract: A spark plug having excellent load life performance, and a method of manufacturing the same, the spark plug having a connecting portion which electrically connects a center electrode and a metallic terminal within the axial hole of an insulator, the connecting portion including a resistor whose porosity is 5.0% or less.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: October 13, 2015
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Haruki Yoshida, Toshitaka Honda, Houju Fukushima
  • SPARK PLUG AND MANUFACTURING METHOD FOR SAME
    Publication number: 20130175922
    Abstract: A spark plug having excellent load life performance, and a method of manufacturing the same, the spark plug having a connecting portion which electrically connects a center electrode and a metallic terminal within the axial hole of an insulator, the connecting portion including a resistor whose porosity is 5.0% or less.
    Type: Application
    Filed: September 7, 2011
    Publication date: July 11, 2013
    Inventors: Haruki Yoshida, Toshitaka Honda, Houju Fukushima